Jar-closure.



G. BITTER.

JAR CLOSURE.

APPLICATION FILED JULY 5.1917.

1,258,465. v Patented Mar. 5, 1918.

{f anventoi 3 attO'I/MHd C lib GEORGE BITTER, 0F PERTH AMBOY, NEW JERSEY.

JAR-CLOSURE.

Specification of Letters Patent.

Patented Mar. 5, 1918.

Application filed July 5, 1917. Serial No. 178,577.

To all whom it may concern:

Be it known that I, Gnoncn RITTER, a citizen of the United States of America, residing at 287 Watson avenue, Perth Amboy, New Jersey, U. S. A., have invented new and useful Improvements in Jar-Clo sures, of which the following is a specification.

The present invention relates to closures for jars and the like, and more particularly to the class of closures where an air-tight closure is provided characterized by the features that the closure is held permanently and tightly in place for anylength of time desired and during rather rough handling, in passing the closed jar or the like'from manufacturer to consumer, and yet that the closure may nevertheless be easily and instantly removed by the consumer at will The closure of the present invention is of the type in which one or more sheets, disks or diaphragm members are laid over the open mouth of the jar and then pressed down around the neck surrounding the jar mouth by means of a collar, ring or strap. Previous constructions of this general na-' ture have had the disadvantage that where paper, cardboard or parchment sheet members were used, the forcing ring or collar has always been formed of metal or of some material different from the material from which the sheet member is made, but never, so far as I am aware, of a material such that the ring would have the physical property of adapting itself to imperfections in the molding of the jar mouth and neck and of acting somewhat as a gasket to fill or calk the irregularities of the crimped marginal portions of the sheet member. Rings, collars or straps of metal have-had the further disadvantage that metal and paper are materials having vastly different coefficients of expansion. As a result, when a forcing or crimping member of metal has been used in connection with paper, cardboard, parchment or analogous disks for forming bottle closures, the subjection of the bottle or jar to heat has tended to expand the metal ring to the extent of loosenmg the same and making the closure unreliable as to air-tightness. For this reason, some previous constructions have included an annular gasket of rubber or the like for interposition between the crimped down portions of the sheet member and the ring,

collar or strap. The rings, collars and straps of metal have also had the further disadvantage that when embodied in constructions which approximated a sufficiently permanent air-tight closure, destruction or removal of the closure by the consumer has been accompanied by considerable difficulty and annoyance.

The present. invention involves the provision of a substantially air-tight closure for jars, and the like, comprising one or more sheets of cardboard larger than the jar mouth so that the sheet or sheets may be placed over the jar mouth to have the marginal portions of the sheet or sheets project beyond the bounds of the jar mouth, in combination with a cardboard forcing collar of such dimensions relative to the exterior of the jar mouth that when the collar is placed on the sheet or sheets the collar may be forced down around the neck to collect the marginal portions of the sheet or sheets between the collar and the exterior of the jar mouth. Preferably two sheets are employed, having marginal indentations to provide a plurality of substantially duplicate marginal tabs whereby the sheets may be arranged with all the indentations of one sheet covered by the tabs of the other and vice versa. Preferably also, the lower sheet is of lighter weight cardboard than the upper sheet, and the lower sheet is impregnated with parafiin preliminary to the application of the sheets and the collar to a jar neck to form the closure. It has been found that the relatively soft and moldable, yet tough and fibrous character of a cardboard collar so coacts with the similar charaoteiistics of the sheets, particularly where there is an unparafiined sheet interposed between the collar and the lower thinner paraffiued sheet,

as to cause the collar, while it is being forced into position to crimp down the marginal portions of the sheets, to fill or calk the spaces between the ridges and other irregularities of the marginal portions of the sheets, and the indentations where the marginal tabs are provided; and that when the closure thus formed has been dipped in a solution of silicate of soda, shellac, or other suitable substance, the closure is with the required degree of permanence additionally anchored in place on the jar neck, and the parts become joined to each other to form a unitary cap which is easily removed and will not fall apart when the same is being removed from the jar and which maybe replaced as such unitary cap after the jar has been opened.

The invention will be clearly understood from the following description when taken in connection with the accompanying drawing, which illustrates the embodiment of the invention at present preferred. lln this drawing,

Figure l is a side elevation of a ar neck, with the two sheets laid over the jar mouth and the forcing collar placed on the uppermost sheet in readiness to form the closure;

Fig. 2 is a top plan view of the parts of the closure shown in Fig. 1;

Fig. 3 is a view similar to Fig. 1, showing the closure formed on the jar, the collar being broken away; and

Fig. l is an axial section taken through the parts as shown in Fig. 3.

Similar reference characters refer tosimilar parts throughout the several views (f the drawing.

The parts of the closure before the latter is formed comprise a lower disk of cardboard 5, an upper disk of cardboard 6, and a cardboard forcing ring or collar 7. The two disks are preferably formed as stampings from sheets of ordinary manila cardboard. The disk 5 is made from lighter weight cardboard than the disk 6. The forcingring 7 is made from similar paper material; and may consist of a longitudinal subdivision cut from one end of a spirally wound paper tube such as isused sometimes for mailing purposes. "The marginal, portions of the disks 5 and 6 are indented asindicated at 8 in Fig. 2 to provide the tabs as indicated at 9 in hi .'2. The disk 5 is impregnated with para so that when it is crushed down over the jar month by the forcing ring 7 acting through the disk 6, the parafiined under surface of the disk 5 will cling closely and smoothly to the rim of the bottles mouth and the bottle neck sur- I rounding the rim; the softer and thicker disk 6 .coacting with the parafiin-hardened indentations, edges and other irregularities on the disk 5 to fill or calk all air cracks or passages.

In operation, the three parts 5, 6, and 7 are positioned on top of the jar mouth as indicated in Fig. l and Fig. 2, and then the forcing ring Z is pushed down as shown in Figs, 3 and 4: to crimp the marginal portions of the disks 5 and 6 as shown in Fig. 3. The closure as thus formed and positioned on the bottle neck and over the bottle mouth is dipped in silicate of soda, shellac, or the like, and the solution is permitted to harden, welding the three parts together into a unitary structure which in effect is an integral paper cap. The drying of the cap after being dipped in the solution described, results in cementing the cap in place on the jar with sufficient tenacity to insure that ordinary commercial handling of the jar will not accidentally displace the cap or destroy its air-tight efiiciency. When the consumer desires to gain access to the contents of the jar, it is merely necessary to insert a blunt knife or the like under the lower edge of the forcing ring,-and then by rocking the knife lift 0d the cap; which will come free as a unitary member thereafter available for temporarily closing the top of the jar as many times as desired.

The arrangement describedwill be seen to have -the important commercial advantages of being economical of manufacture and easy to apply, all without the use of complicated special machinery orappliances.

of any kind.

ll claim:

A substantially air-tight closure for jars, and the like, comprising a pluralityof sheets of cardboard each larger than the j ar mouth so that they may be placed one above the other over the jar mouth to have marginal portions thereon project beyond the bounds ofthe jar mouth, each of the sheets having marginal indentations to provide a plurality of substantially duplicate marginal tabs whereby "the sheets may be arranged with all the indentations of one sheet covered by a tab of the other sheet and vice versa, and a cardboard forcing collar of such dimensions relative to the exterior of the jar mouth when the collar is placed on the and the jar neck.

ln testimony whereof I have signed my I name to this specification.

GlEUldGrlE RTTTJER. 

